Phonograph-motor



E. J. POSTAL. PHONOGRAPH MOTOR. APPLICATION FILED MAY 22, 1919.

Patent-ed Den. 6, 1921.

Swvewtoz M i 11 77 w E. J. POSTAL. PHONO GRAPH MOTOR. APPLICATION FILEDMAY22, I919.

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Application filed May 22,

To all whom it may concern.

Be it known that 1, Farmer J. Fosrnn, a citizen of the United States oiAmerica, residing at Grand Rapids, in the county of Kent and State ofMichigan, have invented certain new and useful lmprovements inFl1onograph-Motors; and l do hereby declare the following to be a lull,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to malre and use thesame.

This invention relates to motors and is particularly concerned with aconstruction oi motor particularly adapted for use in operating therotating dish carrying-table ott phonographs. lit is a primary objectand purpose of the invention to produce amotor in which an exceptionallylarge reserve of power may be had so that the motor will operate anexceptionally longtime at constant speed without rewinding to replenishthe power. A :t'urther object oi? the invention is to provide a novelmeans for changing the speed of movement or thedislecarrying table anddrive the at diilerent speeds, the motor shaft running at a constantspeed. A still further object is to provide a motor shaiit which isdriven from both sides thereoi? so that the pressures against the sidesthereof are balanced and the only thrust imparted to the shaft is an endthrust which is readily taken care of by a suitable end thrust hearing,this being a feature conducive to greater serviceability oi .and longerlife for the motor. Various other objects and purposes than thosespecifically mentioned, together with many novel combinations of partsand arrangements thereof to attain the same will appear fully and indetail as understanding of the invention is had from the followingdescription, taken in connection with the accompanying drawings,illustrating the motor, in which drawings,

Figure l is a side elevation, with parts broken away, of the motor.

Fig. 2 is a fragmentary sectional view taken vertically between the twospring drums of the motor.

Fig 3 is a vertical section through one of the spring drums, a fragmentof the other drum also being shown.

Fig. 4: is a fragmentary elevation showing one means of control forchanging the speed oi? the table.

Fig. 5 is a view of a detail ol structure specification of LettersPatent.

Patented Dee. h rear leis. serial. no. 299,031.

relating to the retaining ratchet tor the winding shalt or the motor,the parts being shown in side elevation and with portions removed.

Fig. 6 is a plan view oi": said parts.

Fig. i is a horizontal section talren substantially on the line 7- 7, ofFig. 1, and

Fig. 8 is a fragmentary elevation and sectional view illustrating aslight modification in the means used for changing the speed of thespindle carrying the disk table.

Like reference characters refer to like parts in the several views oithe drawings.

The main support for the motor construction comprises a metal frame 1having sides and ends and provided with various parts for the attachmentof the elements of the motor mechanism which is mainly located withinthe frame. This -frame is ordinarily located below the top 2 of acabinet, as is usual in phonographs, a spindle 3 to the upper end orwhich a circular disk carrying table l is connected, being mountedvertically in the frame and extending above the top 2 so that the tableis practically the only portion oi? the mechanism disclosed to view. Thespindle 3 has a collar 5 a short distance below its upper end which isreceived in a suitable recess in the frame 1, a plate 6 being attachedto the frame above the collar to hold the spindle in place and anysuitable anti-friction bearings being used for the easier operation. ofthe spindle. The spindle at its lower end enters the bored out upper endoi? a stud 'Z' threaded through a support ing part 8 of the frame theend oi" the spindle being provided with a small ball which rests on alargerball 9 carried by and within the stud as shown. A. friction wheel10 is splined on the spindle 3 and is provided with a collar 11 to whicha yoke 12 is con nected, said yoke projecting from a slide 13 mountedfor vertical sliding movements in a guide 14 which is formed as anintegral portion of the frame and from the lower end oi which thesupporting arm 8 extends.

A linlr 15 connects the slide 13 with one end oi a lever 16 which ispivotally mounted between its ends, the other end being equipped with aroller 17 which bears against the cam-like end 19 of a cylindricalmember 18 mounted to turn about a vertical axis in an indicating dislr20. An operating button 21 is connected to the upper end of the member18 by means of which the said member may be turned thereby changing theposition of the lever 16 and of the slide and attached friction wheel,the Wheel being moved up or down on the spindle 3. A pointer 22 isattached to the operating-button or head 21 extending oversuitableind-icating characters on the disk 20 and in this mannerindicating the speed of the table changed with the change of position ofthe friction wheel with respect to the friction disk 24 against whichthe friction wheel bears.

In Fig. 8 a slight modification in the manner of operating lever 16 isshown. The end of said lever is pivotally connected to a pin 17rotatably mounted in a sleeve 18 which has a'diagonal slot 19 outtherein, a pin extending from the pin 17 through the slot. Theindicating disk 20 is formed integral with the sleeve 18 and theoperating head 21 is attached to the upper end of the pin 1'. Thisoperates to change the position of the friction wheel 10 practically thesame as the other construction and is equivalent thereto in allrespects. The pointer 22 works in exactly the same way. This indicatingdisk is attached to the top 2 of'the cabinet of the phonograph and theoperating head is above the same in ready and convenient position foroperation with the indicating disk and pointer easily seen. The frictiondisk 24: is fixed at one end of a shaft 25 which is mounted horizontally.in the frame 1 in suitable bearings 26 and 27, the latter being an 'endthrust'bearing like that used for the lower end of the spindle 3.Substantially at its central portion a worm 28 is cut on the shaft 25.

At each side of the shaft 25 a spring drum is mounted. Each drumincludes a vertical shaft made up of lower and upper sections 29 and 29*around and loosely mounted on which are upper and lower drum sections 30and 31 between which a ring 32 is placed the same being permanentlyattached to the upper drum section 30 and formed with a consecutiveseries of worm teeth to mesh with the worm 28. Within each drum sectiona strong band spring33 is placed one end being attached to itsrespective shaft section and the other to its drum section. 'It will benoted that both worm gear rings 32 engage with the worm 28 and atdirectly opposite sides thereof so that there is no tendency for theshaft 25 to spring out and away from a worm gear, the pressure normallycausing this tendency being equal and opposite on the opposite sides ofthe worm. Furthermore, the four springs when wound carry a large storeof energy which serves to run the shaft 25 and associated parts arelatively long time, much longer than the usual phonograph motor,requiring that. the motor be wound but seldom. The thrust hearing at 27receives all of the thrust imparted by mounted on the frame l.

the worm gears and is amply able to take care of it. Of course, a doubleright and left worm maybe used instead of the worm 28 and the end thrusteliminated also if desired.

A. worm gear 34 is fixed on the shaft 25 in engagement with a worm whichis formed in the length of shaft 36 suitably A governor 37 of the usualcentrifugal type is mounted on and rotatable with shaft 36, the sameincluding a plate which moves with respect to shaft 36 as the governorweights are thrown outward, bringing the same against the end of a brake39 pivotally mounted on a depending part 40 of the frame, and adjustableto different positions by operation of an adjusting screw 41. This brakeis set at the factory and determines the constant speed of the motorshaft 25, any attempted speed above such constant speed bringing thedisk 38 against the brake member 39 with a consequent frictionalobstruction of the speed until it resumes its normal constant speed.

The springs are wound by turning the lower drum sections of the twodrums. A worm gear 4-2 is attached to the bottom of each lower drumsection 31, and a worm 43 on a shaft 4% meshes with each gear 42, asshown. Turning the shaft 44 serves to wind the springs 33 in the lowerdrum sections 31. and the upper springs in turn are wound by the forceof the lower springs transmitted through the shaft sections 29 and 29.The end of shaft 44-. has a squared portion for the reception of asuitable crank for operating the same. Said shaft 44 has a ratchet wheel45 fixed thereon just outside of the frame 1 with which a dog 46 isadapted to engage to prevent return movement of the shaft. A disk 47having two projectingannular flanges is also attached to the shaft -14;alongside of the ratchet wheel, and a member 4-8 is placed around thedisk between the flanges. the same being bent to frictionally engageagainstthe flanges as shown in Fig. (3. Member 48 extends from. the diskat one point and engages with a pin 49 on the dog to. being slotted at50 to pass over the pin. lVhen the shaft is turned to wind the springs,the frictional engagement of member 48 with the flanged disk 4:7 has atendency to turn member 41:8, and the angle. of the sides of the slot 50is such that such turning movement moves the dog 4L6 outward just beyondthe ends of the ratchet teeth and the winding is accomplished withoutnoise of the dog passing over the ratchet wheel. The dog returns byspring pressure to holding position when the turning of the shaft 44 isstopped. The outward movement of the dog 48 may be stopped in anysuitable manner after it is out beyond the range of the teeth of theWheel and be fore the member as entirely disengages from pin 49.

A housing 51 is attached to the member 1.4 of the frame, as shown inFig. 7 in which a rod 52 is slidably mounted, being spring actuated by aspring 53 so that the end of the rod presses against the slide 18, Thespring is located between a collar on the rod 52 and a closing cap 54for the housing. in this manner the friction, wheel 10 is maintainedwith steady and uniform pressure against the friction disk, andcompensates for any wearing of the two friction members WlllCll mayoccur.

The construction of the motor described is one noiseless in. operation,one in which the winding of the same has to be done but infrequently,and one in which the different speeds for the disk carrying table may beeasily and noiselessly edected by friction transmission between theconstant speed motor shaft and the spindle carrying the table. in thisconnection it is evident that if a spring should have any tendency tostick in its unwinding, the other springs will operate to at onceovercome such tendency and there will not be any of the noises ofrelease of a spring where one only is used. l'n order for thi to occurit will be necessary for all four of the springs to stick together atthe same time, a practically impossible occurrence. Moreover there is nodiminution of power at any time to run the shaft 25, for if a spring inone of the drums should stick, the other one in the same drum will actand at the same time the other drum on the opposite side of the shaftwill continue to operate under full force, at once compelling the springwhich sticks to release and continue its work. lhe large store of powerin the four springs makes the winding of the device necessary only atlong intervals.

The construction is relatively simple. and

economical to make and it can be produced at a comparatively low cost ofmanufacture. The motor is very effective for the-purposes for which itis designed and has proven satisfactory in all respects in actual andsevere tests.

ll claim:

1. it; motor including a supporting frame, a shaft mounted horizontallyon and within the frame, said shaft having a worm formed at one point inits length, a drum mounted to turn about a vertical axis at each side ofthe shaft, each drum comprising an upper and a lower drum section with aring interposed between the same, said ring being formed as a worm gearat its outer edges, and said worm gears meshing with the worm atopposite sides thereof, a spring within each drum section, means tosimultaneously wind all of the springs, and mechanism driven by theshaft, substantially as described.

2. A motor comprising a supporting frame, a shaft located horizontallyand mounted for rotation in the frame, said shaft having a worm formedin length between its ends, a drum located at each side of the shaft, aworm wheel. on each drum meshing with the worm at opposite sidesthereof, a shaft extending vertically through each drum and on whicheach drum is rotatably mounted, a spring in each drum attached at oneend to the shaft and at the other end to the drum, a winding shaftmounted on the frame, gears thereon, one for each drum, gearingconnections between the drums and said gears, and memos for holding thewinding shaft in any position to which it is turned against returnmovement, substantially as described.

3. A motor comprising a supporting frame, a shaft mounted horizontallythereon for rotation, a worm formed on the shaft between its ends, adrum mounted to turn about a vertical anis at each side of th shaft, aworm gear on each drum meshing with the worm at opposite sides thereof,spring means housed within the drums for normally turning the same abouttheir respective vertical axes, means for winding the said spring meansin both drums simultaneously, a worm gear on the shaft, a governor shaftmounted. on the frame, said shaft havin a worm in its length with whichsaid last mentioned gear engages, a governor on the governor shaftoperable to maintain the first shaft at constant speed of rotation, andmechanism driven by said first shaft, substantially as described.

4t. A motor including a horizontally mounted drive shaft, said shafthaving a worm formed in the length thereof, a friction disk connected toone end of the shaft, spring drums mounted one at each side of theshaft, each drum carrying a worm gear in mesh with the worm at oppositesides thereof, means for winding the drums to tension the springstherein, a vertically mounted spindle, a friction wheel splined thereonand in frictional engagement with the friction disk, and means forchanging the position of the friction wheel on the spindle.

in testimony whereof lt affix my signature.

ERNEST J. POSTAL.

